/*
 * Copyright 2008 The Apache Software Foundation Licensed under the Apache
 * License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
 * or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package org.apache.ibatis.ibator.generator.ibatis2.sqlmap.elements;

import java.util.Iterator;

import org.apache.ibatis.ibator.api.IntrospectedColumn;
import org.apache.ibatis.ibator.api.dom.OutputUtilities;
import org.apache.ibatis.ibator.api.dom.xml.Attribute;
import org.apache.ibatis.ibator.api.dom.xml.TextElement;
import org.apache.ibatis.ibator.api.dom.xml.XmlElement;
import org.apache.ibatis.ibator.generator.ibatis2.Ibatis2FormattingUtilities;

/**
 * @author Jeff Butler
 */
public class UpdateByPrimaryKeyWithoutBLOBsElementGenerator extends
		AbstractXmlElementGenerator
{

	public UpdateByPrimaryKeyWithoutBLOBsElementGenerator()
	{
		super();
	}

	@Override
	public void addElements(XmlElement parentElement)
	{
		XmlElement answer = new XmlElement("update"); //$NON-NLS-1$
		answer.addElement(new TextElement("<![CDATA["));
		answer.addAttribute(new Attribute(
				"id", introspectedTable.getIbatis2SqlMapNamespace() + "." + introspectedTable.getUpdateByPrimaryKeyStatementId())); //$NON-NLS-1$
		answer.addAttribute(new Attribute("parameterClass", //$NON-NLS-1$
				introspectedTable.getBaseRecordType()));

		ibatorContext.getCommentGenerator().addComment(answer);

		StringBuilder sb = new StringBuilder();
		sb.append("update "); //$NON-NLS-1$
		sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
		answer.addElement(new TextElement(sb.toString()));

		// set up for first column
		sb.setLength(0);
		sb.append("set "); //$NON-NLS-1$

		Iterator<IntrospectedColumn> iter = introspectedTable.getBaseColumns()
				.iterator();
		while (iter.hasNext())
		{
			IntrospectedColumn introspectedColumn = iter.next();

			sb.append(Ibatis2FormattingUtilities
					.getEscapedColumnName(introspectedColumn));
			sb.append(" = "); //$NON-NLS-1$
			sb.append(Ibatis2FormattingUtilities
					.getParameterClause(introspectedColumn));

			if (iter.hasNext())
			{
				sb.append(',');
			}

			answer.addElement(new TextElement(sb.toString()));

			// set up for the next column
			if (iter.hasNext())
			{
				sb.setLength(0);
				OutputUtilities.xmlIndent(sb, 1);
			}
		}

		boolean and = false;
		for (IntrospectedColumn introspectedColumn : introspectedTable
				.getPrimaryKeyColumns())
		{
			sb.setLength(0);
			if (and)
			{
				sb.append("  and "); //$NON-NLS-1$
			}
			else
			{
				sb.append("where "); //$NON-NLS-1$
				and = true;
			}

			sb.append(Ibatis2FormattingUtilities
					.getEscapedColumnName(introspectedColumn));
			sb.append(" = "); //$NON-NLS-1$
			sb.append(Ibatis2FormattingUtilities
					.getParameterClause(introspectedColumn));
			answer.addElement(new TextElement(sb.toString()));
		}
		answer.addElement(new TextElement("]]>"));
		if (ibatorContext.getPlugins()
				.sqlMapUpdateByPrimaryKeyWithoutBLOBsElementGenerated(answer,
						introspectedTable))
		{
			parentElement.addElement(answer);
		}
	}
}
